'\" te
.\"  Copyright (c) 2001, Sun Microsystems, Inc.  All Rights Reserved
.\" The contents of this file are subject to the terms of the Common Development and Distribution License (the "License").  You may not use this file except in compliance with the License.
.\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing.  See the License for the specific language governing permissions and limitations under the License.
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.TH _LWP_KILL 2 "Aug 8, 2001"
.SH NAME
_lwp_kill \- send a signal to a LWP
.SH SYNOPSIS
.LP
.nf
#include <sys/lwp.h>
#include <signal.h>

\fBint\fR \fB_lwp_kill\fR(\fBlwpid_t\fR \fItarget_lwp\fR, \fBint\fR \fIsig\fR);
.fi

.SH DESCRIPTION
.sp
.LP
The \fB_lwp_kill()\fR function sends a signal to the LWP specified by
\fItarget_lwp\fR. The signal that is to be sent is specified by \fIsig\fR and
must be one from the list given in \fBsignal.h\fR(3HEAD). If \fIsig\fR is 0
(the null signal), error checking is performed but no signal is actually sent.
This can be used to check the validity of \fItarget_lwp\fR.
.sp
.LP
The \fItarget_lwp\fR must be an LWP within the same process as the calling LWP.
.SH RETURN VALUES
.sp
.LP
Upon successful completion, \fB0\fR is returned. A non-zero value indicates an
error.
.SH ERRORS
.sp
.LP
If any of the following conditions occur, \fB_lwp_kill()\fR fails and returns
the corresponding value:
.sp
.ne 2
.na
\fB\fBEINVAL\fR\fR
.ad
.RS 10n
The \fIsig\fR argument is not a valid signal number.
.RE

.sp
.ne 2
.na
\fB\fBESRCH\fR\fR
.ad
.RS 10n
The \fItarget_lwp\fR argument cannot be found in the current process.
.RE

.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(7)  for descriptions of the following attributes:
.sp

.sp
.TS
box;
c | c
l | l .
ATTRIBUTE TYPE	ATTRIBUTE VALUE
_
MT-Level	Async-Signal-Safe
.TE

.SH SEE ALSO
.sp
.LP
.BR kill (2),
.BR sigaction (2),
.BR sigprocmask (2),
.BR signal.h (3HEAD),
.BR attributes (7)
